Apparatus useful in testing efficacy of insect repellents



FIG. 1 is a perspective view of an apparatus useful in testing the efficacy of insect repellents, showing our new design;

FIG. 2 illustrates a front side elevation view of the apparatus according to FIG. 1.

FIG. 3 shows a back side elevation view of the apparatus according to FIG. 2.

FIG. 4 is a top plan view of the apparatus of FIG. 2; and,

FIG. 5 shows a bottom plan view of the apparatus of FIG. 2. 

The ornamental design for an apparatus useful in testing efficacy of insect repellents, as shown and described. 